Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52ac5437cdd45d3ca4cf7046b3785473d90852da0be836aabe95c5c146b6acac' 
  AND token = 'urk/osfQpyxSVk42yZi5RY9XZfORxsxjcv5Zabto4ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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