Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d7d1ec96831b111bd68feaac35367f19264d9e29928733280ee9bd50d3441d5' 
  AND token = '6hlzylR3i0HthxoQ5m4sKQe6E+60QH6hlLERAItEdnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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