Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbe2382bbfd84cbf1aee562d392ef6c1fe3c33994c57354d35d1b3b438c83188' 
  AND token = '4CWKd5UZFipS9m31VSiVqqN9HsVWDYwumBBDuqY3w8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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