Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '289ebb0cf56cf328ca9f29b8df9c543b717bfaca234b4adcc6d7aebf16e19ddd' 
  AND token = 'NbRsj89Lj3PjeXOtR/8gW+guwVCVmSixtiECm9lzzAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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