Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3d3f805a0be520c0d61c4fdb5f4ab5a33399845ef121c3048fcf9a55a6cc5f3' 
  AND token = '8B3CIr//mRiY2/0XOcBs8h8iiEliuf8Vcd2gfSEGBx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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