Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '386654946b40b58549c2049310daf10299a9b49411684ea45b509e6354512f26' 
  AND token = '6CMco8hr+2JVwh0Hu6XvnMuz0RgEY+hgPsCdlO7cq38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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