Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a253d51a7e717861f18cfee316964ec9993baf84321ea29a6db33dfe9632b34e' 
  AND token = 'cM6dpBe1rNhTjmRzfnIDP6KeQGC8l5MHqne/JcG2Q7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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