SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f07771b8fd98e18f8ba303538d6cfae248175d94cc3e272b64e5c611b8cee00f' 
  AND token = 'gkhsIqgewZ/kWndlG9HLVzCFagWY3gEDlTJHA1uLrrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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