Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e9e3621352dd8148ff3c83c4b11572cb1dba415fdd91f79e46bf54709601dfa' 
  AND token = 'DaY3iHT6KR52uO3f9ZUMQC27ijL5jscHO0NamMGHq5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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