Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16ed6a6b904f078797f8b747bb7dacf3b0a90aa420bdc8d537ea704e4e941b46' 
  AND token = 'M3kBzZI8bwUlklA3/nN08b4u5tiSbguF5tguFWOJM00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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