Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '325f6e82e6e04b2b6fd351ce5cf3850390a567866fddf4597458c981186c1b18' 
  AND token = 'qwBZc6n4Ro8ru+W397Pm3HuopwdwSMQIE1YIxMJmiYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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