Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48b4236595d266208bad5c6d46262fc73c4a3ba7a5bacfcb93916a4b393d179a' 
  AND token = 'auSMNhUe59+8TkaN3ecp14kyswgI/RnSIN3CfOtgLM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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