Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e3762ce32e14eafbedea94d65751ed974aa745c716a38cc8731238a37fb1a5d' 
  AND token = 'a3JFpTKgxlyQkopl0+2IRlPkO33tgUKqqDcZ+f59gKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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