Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '736b060f414162337d28b7fd8dce2a7f1225b30933836877365654487dc14a45' 
  AND token = 'kImh5by5xM5efk7NSGIN3zdzoa+Os6v4x8ZcnvtInJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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