Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a82f9de5ca3ecf41431e429b0437b34700723da6ce553d9c43cf4fa2df25ae7' 
  AND token = '2gtTmrVPF5V2rct6ACbr00P+sNJTUMle4OPstKR6xoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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