SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f6af7cbaf7c1d065baabb543d76df6d54a2dbe5fc823c2d95fd5e988c226e5b' 
  AND token = '+gEWll0M7ZuCNTC+4zIo21jptR3eYiKFSjDvIpyVOXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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