Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9a3becac9a69531ac1533666b67f2ea7ad5fb3baf29241da10672cd7a7c5beb' 
  AND token = '2qK2zSVEH/tBd618WHNziz2jwGr6QHx/X39Zh+QMT5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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