Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f86b9facb898cacd1443a55c53594852e417485c31ce88629bebf84d804a6ec' 
  AND token = 'ELP3fpJONzhycutF0+NhLgEteqRkzj+RZerbQBJWou4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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