Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29edee21466e64abcec789b74c26fbbd0916f3c004f1856918124ac6028cbd23' 
  AND token = 'Q0XLfu+3hiazxpeWy3cm5RJoXxqLXfkMBpCFtc8uglc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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