SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b96362deeeb99a02c7d92f47c6023eeff4241a24815197817578833d534e72' 
  AND token = 'GTc9OnKwZjKFUbQS5vy6Bgu4VhzBpD7Xt7eizaWimHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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