Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6fd386faedc7644725e380a5666b06de2a9f0b0670095624920d734ae390f3fa' 
  AND token = 'rJObJO/hwsZs7Ehv3k3KIKTd/szJx2p4g5ja5p7QWK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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