Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8152b888fcb8df9cf707ab8127c05487c89d559204f52f433c2524a062fe6896' 
  AND token = 'IhtCgSd2uuv5ndzH/DJuijyZ509FjoHr3sNvTSwCvcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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