Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9949320a54760a1e8a967a49d0fd7855205cd2164e51375f42deef124a79438d' 
  AND token = 'IzLNOuVbneP8v/aq6a4B6zh1b71joTUXmFMoriOc0dM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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