Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36dc34da5421cafd49b6126305a68a7ab3f71cabaed79cb10f6c68646ddf8d60' 
  AND token = 'tgtqMcgPUpI/+NwV7KDVigOzVGvpDNOMe2eAFLUib+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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