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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c62b3418074a403643f202d320e97ec1d341413c13c8c2e76b0bf806c9af32ac' 
  AND token = 'c/EP1J1Ax/XfSyoQsk9GP9ho2wgO3EknYfP1Sa08kqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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