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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bda4914f39ea9eb4bcf8053b23da5ec1b377c959b5cf374f22991483f1129ca0' 
  AND token = 'UbOUnMjeklhzIom3bViYzlnET//qopU9k8LPH9XIkvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}