Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '864dac585d20de4c1dd5c38b05c5c8462ba233da921a5a4b64e3c842f7eaf9b0' 
  AND token = 'b+Hvzq+MD8yxeBq719ijBEsddJoZGMZrwjd69zNgbLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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