Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5312baee3d8b5b1f84bc15773958456bb0004a5df5a0aa1612b36d68b1b7f718' 
  AND token = '1hlO/foyrnC9bv86Dgpi9Dtah+vDE3SU+eDtc5Gl1g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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