SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6223cef299d527f6185c854d1ecfea65e84f61bbc85eaf0fc26f8600010af061' 
  AND token = 'pBGRxw3gN5h3YNVhgzLMHOyJQEmvQBb+9W1st7gQVkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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