Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1d185fe7945754058310f39da4fb1c1d54875a0a7fee2d4b947dce29359593e' 
  AND token = 'xl7ZrYWL898nhSAmhm+IJmqfGrn9L9hxexjAQU2Ab1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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