Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bb954654539b56cbed7d45ebb115b278fabd7d18dba5ea644920682208a9839' 
  AND token = 'LkUG6dmXZynhZO6yeMKAfDxnMdybuLgNEWKj0AvR1rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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