Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a433f1403d45ffb41639a1ed24c02a03aac2ced80b8f55a488aa4bc10715d73f' 
  AND token = 'mTKjdnu3d5mRo9dlk4oEVviLhtcubcjkv+jMzCAGUo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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