Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '907d9686d27afd3880d1927ee426abe4f453e25c99224e6c4ba079621e2d9ec6' 
  AND token = '9jHJUK1OxguEGJYh3waBynWTO0ybbbFiSr+VNvhurtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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