Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee306f9888acfb5c5ab5498c276d66b3dfbb96fa85dfba41bb8920cee7f876d' 
  AND token = '6FOqg50bhLa1cb/i+AtdtYTBFCJNt1NZuAeR4iLFbcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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