Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f17f21cc1727499ab86fd2671d7d61cb6f3d8539df221796bc84627eb2680158' 
  AND token = 'XKPc8pD7uQHufphcnTuTmpx04VwbLgWDze2Z1Q3vpug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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