Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93a84d5fd2ec31ae662a5ae0af508977b9beb5a83376852617cdbaea1a3f57b1' 
  AND token = 'DimQ/1WUoiuCol2dz2WYMS9EDlGnl3uHa5LneANtoQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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