Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c550934ac67c1799947cbae8cca2226bf2a93ffaeebdfa4c4c962785e08bd000' 
  AND token = 'wYQtQZWa36YBQWLGkP+5N7DNQCnEnxLfgbUP92Y9ES4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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