Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39e4e797c1062e2bd1692c12fc14304374ca5033feafb142be1f8603682c71a9' 
  AND token = 'ePiFnnzBcYXy0eRY1t+OyY47zmpk7t9Qft3EVkRgcGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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