Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '846e6f41203f62922ea7c0e6c413a3e11ea4f0e4c52a7a4232b107fcb8e3577a' 
  AND token = 'YmSn4ZLI1cYl/I0FPvfM3AsNEQHOe4LwcIbA6hn+tiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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