Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c10bede92bba90dbbfef324c4f53cd8a2359b07905754229625fd2910c7f4c95' 
  AND token = 'QMEbXkux82eZfQ8jv2RVydhc7GuZb7t19WfSmThPPDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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