Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5deafb276dccc426a572720a9f2202371197588b270aaa6efa350eb9ac2a5a3' 
  AND token = 'VqwQI0+wdCmhI5o0GzjHb9LfS9u5NtJuSoxiEj2Rq7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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