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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fabcd9c0f8645ece7140e04832e9baad26323d9d8de789951ffd887ceeac5551' 
  AND token = '5YW8FTv+4DYZol79yzY5Fmn+npXUfyKHgr03Y2bG/tc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}