Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '310c0ceee8c743183de9a5884d5d41678d9c7ed6170aad394a6a3156f86ae45f' 
  AND token = '43+mkrGnyX71t6okiy0hvQaSHiQyYlrG2w6rtDZE9ec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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