Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eaf598bf66bcd992653ff89b74d4e3a1ea3e9c53942ebe8a0d0488aec01d748' 
  AND token = 'j0sD2hcMaBf6kYDz960ThRieNp30VglpKGx1lL74Jr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}