Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2fcd96d64fec285b0de9edad652c6d558037efbe8fd63e0fa04de5d5372718f' 
  AND token = '4MPQyya/5XGSOO4ykEC2rFSyF9GIQHtTWY3jiTB5/rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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