Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2469d568eefbbee9a5fea8e80978577ef1f4a44656e10aa22e234a71aa8b4875' 
  AND token = '7pFNcjMbB9iXH9fzTHxrQDosnbW1SrJTBW//kILye/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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