Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee87076829a66c5a9ec556338536e306bc7aec9cb98430983e123ba2aabe5cc2' 
  AND token = '7/QPXu6ZsrMh2EVSpTYNGUDyGJDns28njBHw0mWr6x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}