Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '978ce23a88658b0923574f32065c04931e0d71d7b9571ce1502ea8cc08a08e59' 
  AND token = '1nKeC/tK8mvKv08KhLnaEvpBSpAcOEJvs/xx4sPXeMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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