Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a821fefbe71c2415a658430c2e51022a081cfe0fa1944591059b90a187da7e3c' 
  AND token = 'iuNwJiV+odggC0GSgDZhJX3q7/f8+of2c4HKEFEaA+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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