Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f128dad71f7a48c14454b2f58307861ddf7fe7ff0f7e23db276d61ab34da5a11' 
  AND token = 'eoZVf3CkFw7b55n70pZr6UQG8UEYjY+FNLfUzC5IBQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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