Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe1314e432ff5ac6068aeed6dd758f20bd5a8e744f8f8eb0e0ac721a87c07fa9' 
  AND token = 'a1Q5Hxy8+7XFkLww5xEEXjRWmWr6ZbuD0BAX9lo/nOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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