Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c6559fc01c06c9a19a073118f766abafd40979f88460e6f53be97d70eb986a8' 
  AND token = 'ZUi/QjL8ps9I8F45XOmqhPkOb/lLeLcCTHeuIlk/fd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}