Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5531a637b5eef39cab11d9a64b24e67c2dc100221ebc9491d1c79e098fd3b05' 
  AND token = 'wn/blb6nhkEGKTyY9+0pVs45x7XGnP/gHUp0VBxL0Rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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