Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94ce2cbf816ae76f2d221af258a3bd277bdee0a1fccde49db5d5a9a8510c4b33' 
  AND token = 'Y7WhX1A0pssD45pdoqvzgPRO3Y6MXdKt90fuX/gDkO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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