Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cda9f463c35ecab43ec97bf8dd50a8a00acd15affcef8d9a0f1927b20ef76de0' 
  AND token = 'CXRGm+IV9//q0RDUCmpM1gB4rqVrfny7o5M0Lu8MNiw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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