Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6cc6d9a95e98d5a0f7b496b45b0ba06215d8b15bd89b73b329a675fb3b80cb1' 
  AND token = 'jirrgfj+glc/I3g1irIeh9W4IKnJG7K5xkECu+qLt08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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