Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b18dca3065b1743578714727a5339b675ab8921f4eb97aa4faba14b76552e58' 
  AND token = 'zkt3pikpcc2qaGhFsshuuzrEJesD5MPorJs32wcIqHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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