Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ed9102439684c08046d86fe86f1918d364e88dfb020172359d8d9c3723bd539' 
  AND token = '8hcDFJ7w6/SRdOF8LUO9DWAyqVLHBAE7HZtsYLg6kjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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