Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '292ae91981efd25c2088caa6f12e387baed010042b643e2ed72e6641af869e12' 
  AND token = 'CkUTAo7BSscBJq4erWrdSZll7kwVspKM+TP8OA/89W4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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