SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd467307234365394bebd828962d2a706726c70cab23e5e431ca8951490fd63' 
  AND token = '+9WknyApgh+jzukjHqqwVZw0djDoRB0TvDzdIhX6yBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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