Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bca859dd56b94b5c4354e6dbeb03f45a4a03c7a906275e0672cac50492644da' 
  AND token = '5e6y0P/CjcG32lAuKjIa3t3fRELpWapvfzPn+YO0XkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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