Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10674d9cc7dcac65c683cd89a6b87b0e51f351d69ccb7b3e2702243ae4b8a18b' 
  AND token = 'GDUspvYYtUQqsssSmPkjwjf6wn1luQNqN02+ecjDVGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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