SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6f43d04814284b7a8a4e81bc1059101831867276905d13804b2a518c2a6f83e2' 
  AND token = 'vzzvB3U7ccXH85OGy8wyVlFOrZtOtV/q29H7xDjNmvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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