Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55ca4ebd49bffbc4be158dedb64765d7c0b1f2afe871940a7e79a0c271e4515a' 
  AND token = 'LDW5sxiD/DQKJeN2lfSnTWbHVwEq0yqhUvAupglH//E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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