Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5357a878af479e747f8fbf3efe0fc8179b2cbd24a06dc8554e6f2147101f0915' 
  AND token = '4JhTXHyblUEcDolUvFj3MfjzTNGtg0MdEuvN8aCCTUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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