Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741c91ef1b4e78c3b6e60c90531712c29ee6106bbc4dfe848c8f951e4f04d1cc' 
  AND token = '0AcWW98GAyws26GchfNygloNAsF2UU9duTogx1wjxpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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