Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17b15a3c48e4eb3cb75bb791cc7a61859c364e328c1edee9564d84c1d56c4cb6' 
  AND token = 'tSnCKMfcCacz5cg+0R1YXouy7mrsFJ2QHBG2FD+nPu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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