Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d799a46af1e92687a80450c2892e3fd8c6d4230e391d7c3d1ece28940bf0d69' 
  AND token = 'eoJLLMV8v8R40fwrsgSGXIH9wrzetsUB3Y9NkwUkwTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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