Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '011f07ef804065c519da7edb31b8081da70ca1dfc2c0978f7bc33af96f339f29' 
  AND token = '63IWJos2mTvUIABipjIphE83PQ75bvVsv7dAI9I3IKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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