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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c02685be39c90da68acee871f50e419788c8800ba91a44425a08a5526b7fd685' 
  AND token = 'YTZrdhipLxFNeng5hcK1O/Ywpy02AFVBTDjT/8/34hU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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