Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e0515081831c58d2e47251a42e8ca337ebf988cbd50adf83b44bc3ccc3c4e2a' 
  AND token = 'ugRkxOV2Qj7GmBl1FJ9hfzHkGwl85A+petYON2ZaIMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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