Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '242765bfc72557a122c797b8012016433be8244ad3a58446f34ce0aef4e3aab0' 
  AND token = 'm4wRV/Xxm6krlRq+oJy/u9pCuPNHM33wt/36OILGof0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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