Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dc47ea43b78f5a120d72722727a02152e5490c6d67ae7503cf059df13b8cdb2' 
  AND token = '3mJ+h4z2ed9kkiT8AKSUpWCIJEyxhIZbucR75S923To=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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