Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a161496a1bdc30e0efe2f1eb98ded75cf8bbb41ab76f8474428d461e613e2908' 
  AND token = '2eAAIgEvNW9hf7Q2IODA+xXtoNPgtFTVsDYi4pCQA4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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