Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9be6c59c6b1a2957dd0aaf3540243ccf9555c88047f7414c650df5ba9fba8fbd' 
  AND token = 'xO3dt40aWOpibUaK2Yi4r36tkrOtar1C8BuVxi+iOoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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