Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8c49385b93648ed47db6baca805088c4850f7339cc4913b1181a197113e08f4' 
  AND token = 'LhGlqwrlkqgdq5jVCOsPt0Q0v62PpQw7yv2T2RiPiTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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