Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad77b825d62ace4ecba23b7dd21defd19f97a18985b364228a232318327e5f9d' 
  AND token = 'fTuFlsY3Mn2q5KNJlg7Hddn0Vc8Jgq7k9SjQXsqYngI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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