Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '739176980c1ed850aa6360fa85241907d29c9b231fbd40367d32057c17362a53' 
  AND token = 'f4ZUcmcTzLl7QWoLIMMIz2ohMNNxD1lG0YZyOS6/KXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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