Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38266af74f606578e1f35bc80815fe3e7a1a82eba283cc2d417134f588473937' 
  AND token = 'P1CEP76+S9PnQK3AfkESvpP9v0G+DeTyFshb33EWbsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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