SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e69740ad140f6fe4dcec4555e2612d9935ab7386002da8586b01e669090fed8b' 
  AND token = '69r9P52G637ownqdH+OhKnvszOgpiMQzYQf//hRcxHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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