Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe84a489b5d8d48e71c26c9ee9e30272a5e88b38f496163952a83aebf115f0a1' 
  AND token = 'HEHlA0aDqxHuDpzfXbLIpa8IDV6jK8FXc+J2bk8HVf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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