SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0005614830b26f8c0e87ad1d40d560c9c7b79c7a8875765132f4c193b4376e37' 
  AND token = 'hkaKml1ZGP6vq5PMjtgYJEMd6SGHgfD6jz+Asf6NG7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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