Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c01c8b8620eadc7e359410ea547deed400b8db24f41df00b3809141b30d5268' 
  AND token = '6DDXoOebm/0AKyb7ozHFi94UAyIUJomFa+n1CcYnsrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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