Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48f35bbcca87de471b5ee654b32a10971b8bea1468cd26d078fe03826094d172' 
  AND token = 'U9btHIfeTJ2PqGvsPdR6EJ+JDrSTJA+LDMLx5Rk59hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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