Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dda7a824ecaa9b09d1f046e6e6495cbc7259195c65dfc4dba89eb6275c7999e' 
  AND token = 'JXDo+znhqDA7tokJdcacvhG2dJAaEiiu/KGhCWSF9gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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