Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b47962c41f04fd747c6723c7e1ecd2a634919f6e1d7ebdd03120ba5a2d3b857' 
  AND token = 'aWRDTxiSp4IL3uYYW/cLxCBcXsWc3SdH6fIaZ0xrd/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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