Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d1f433f9ff15fe00753b5b44c14cd257f5236a7de91fb2ac250a8d7bb3391fd' 
  AND token = 'e6kgC/RjFg+s/5KEpAqB2knocpdg3QmHQektsHq0D3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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