Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aba81fb3d2dab17e5ae1af56a97e838cf27096b836344227dbf5167dddd87c7' 
  AND token = 'eNu67OFTI0AZEofTMRa2sKU/Z2u86dFYOIC/8VePVxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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