Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ccff060b695a2c741adeae0189190aa3afdc032ffc59e7df806f74f3a57e7fe' 
  AND token = 'JetIQeCunQxG5ICAWXq8rwM6XehKdPFtkONb2tyLWvM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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