Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea8feb31b8bbcf9cf88d6b6f5b1eaa4f2dcbcd63ce52b63d2778934efa42ce12' 
  AND token = 'wJXOXazoZab1tCbZU/RHwPzZ1d2VQWeDG9849iM+op4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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