Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c44676e6d19d58811a60ab1e6d3b54bd5085c5a41166edd159ce41f7a04a3bf8' 
  AND token = 'ETHDmHmsu3Gvrg2WwgP1RBPS6DflSfttW7WXrp+wX2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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