Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '984f689cac2eeac9150519ce3119b654dab312de8ccef50071e4204179496b82' 
  AND token = 'QGh2NOKphVe3BbvtiN7fEN6o6RjUP+apOlNg5UuvKhU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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