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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e665d952f72eb0a83ff468a71d57db7385b0a3457df4e8dae9bcf20b17ce4cc' 
  AND token = 'U8TZU7exHiHH0fSlI0a+YzYwCn768f3dSa6GKjZF5LE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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