Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '436ac652bea6b05932250fd189cdc8e247317cf0dfa215652cedf93eaba05ceb' 
  AND token = 'yVQBPOOhWqh6lza3Wma3bEKY6vRZb62WPYEIIARj2GM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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