Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c113e88e23d6fac7cfb7e213070d44696daddff6eb256ed18d20a429c091cbd6' 
  AND token = 'pb6V2tJFohaVOYHxTwFMoCNdHASSgkIQIdc3f5TU8zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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