Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '444694616f79e462a2d4021aef8d07a570bd68c54725039c192c20116298dd1c' 
  AND token = 'cj0rWLBdW9Ys8+yWWMtVIFbkT8qF99nDGcB76YprIQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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