Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd6ddd9b3a4e96e2c140f52d95cdcad2cec1a28b132232cef402b33df751780' 
  AND token = '440fZzSdlywjlpi0QB4V+IUKB2iB+HJqZjHWUhORcbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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